Automatic telephone system



March 31, 1964 F. EK ETAL 3,127,480

AUTOMATIC TELEPHONE SYSTEM Filed Sept. 9. 1960 69 Sheets-Sheet 3 IST. so LINE GROUP a *1 STT'II I CALLED *1 sTT-lz PHONE sTT-l a 9 I0! '0 STT-IO u GRADING 72 I SLA Tuner-mom Um] VERTICALS LINE RELAYS To 5* comaf 9 4O SOTS.

CALLING '6 PHONE l a ig: I (no i SLA so I UUULINE RELAYS sw. comafz '7 I e 9 lol J) l [o l 8 I N SLA gngum: RELAYS LINK-l e U LINK-2 LINEFINDER CONNECTOR A CSM CONTROL CONTROL R I D CSl-2 1 SW. coma:

FIG. 5

, INVENTORS FOLKE EK JAOHN s. LINDENHALL my w r nah...

March 31, 1964 F. EK ETAL "3,127,480

AUTOMATIC TELEPHONE SYSTEM Filed Sept. 9. 1960 69 Sheets-Sheet 5 E --25 2ND. 90 LINE GROUP 3RD. so LINE GROUP -12, I" 4TH. 9o LINE GROUP 25 GRADING 12 LINEFINDER 5TH. so LINE GROUP VERTICALS l 48 4o SOTS 49 6 TH. 90 LINE GROUP I 7TH. 9o LINE GROUP GRADING 121 25 LINEFINDER 8TH. 9o LINE GROUP VERTICALS 40 SOTS 49 9TH 9o LINE GROUP FIG. 5

INVENTORS FOLKE EK JOHN S. INDENHALL March 31, 1964 F.1E'K ETAL 3,127,480

AUTOMATIC TELEPHONE SYSTEM Filed Sept. 9. 1960 69 Sheets-Sheet 6 4: SELECTO R 3 SELECTOR 5 SELECTOR s Fl G. 6

INVENTORS FOLKE EK JAORHN S.ALAIEDENHALL m7@%-/.m,&w

March 31, 1964 F. EK ETAL 3,127,480

AUTOMATIC TELEPHONE SYSTEM 69 Sheets-Sheet 9 hi3 EE MEIR? lfilfilfil IEEEE E mmw;

w N w w w W w w n W w w queue LINE3O JNVENTORS FOLKE EK BY JOHN S. LlNDENHALL ARN XML M;n24 "M March 31, 1964 F. EK ETAL 3,127,480

AUTOMATIC TELEPHONE SYSTEM Filed Sept. 9, 1960 69 Sheets-Sheet 10 w Q g g a E E@ E 5 w w w w E W N M W w BEE imgwg F E EK INVENTORS March 31, 1964 F. EK ETAL AUTOMATIC TELEPHONE SYSTEM Filed Sept. 9, 1960 69 Sheets-Sheet 11 MDF CALLING FOLKE EK INVENTORS JOHN s. LINDENHALL y ARNE oxAAL FIG-ll Max-ch31, 1964 F. EK ETAL 3,127,480

AUTOMATIC TELEPHONE SYSTEM Filed Sept. 9, 1960 69 Sheets-Sheet 12 ceun Lcsun H l6--IO 2l---25 26----2O 3I---35 36---- F. EK ETAL 3,127,480 AUTOMATIC TELEPHONE SYSTEM 69 Sheets-Sheet 13 March 31, 1964 Filed Spt. 9, 1960 Mai-ch 31, 1964 F. EK ETAL AUTOMATIC TELEPHONE SYSTEM Filed Sept. 9, 1960 69 Sheets-Sheet 15 March 31, 1964 Filed Sept. 9, 1960 F. EK ETAL AUTOMATIC TELEPHONE SYSTEM 69 Sheets-Sheet 16 March 31, 1964' V F. EK ETAL 3,127,480 I AUTOMATIC TELEPHONE sys'rm Filed Sept. 9, 1960 69 Sheets-Sheet 19 I CT CT! GT2 GT4 7 CT? VSI vs INVENTORS FOLKE EK JOHN s. lilxlgf-NHALL BY ARNE o C3|B(20) 'f March 31, 1964 EK ETAL 3,127,480

AUTOMATIC TELEPHONE SYSTEM Filed Sept. 9, 1960 69 Sheets-Sheet 20 cam (19) Glow L) J L) J H) FOLKE EK INVENTEORS JOHN S.LINDENHALL o AAL 

1. IN AN AUTOMATIC TELEPHONE SYSTEM HAVING CROSS-BAR SWITCHING STAGES FOR EXTENDING CONNECTIONS BETWEEN STATIONS CONNECTED TO SUBSCRIBER LINES, INCLUDING A FIRST SWITCHING STAGE CONNECTED FOR SEIZURE BY A CALLING ONE OF SAID LINES FOR USE IN THE EXTENSION OF A CONNECTION TOWARD A CALLED LINE, A REGISTER MEANS CONNECTED FOR SEIZURE BY SAID FIRST SWITCHING STAGE INCLUDING REGISTER CIRCUITS FOR REGISTERING AT LEAST CERTAIN OF THE DIGITS TRANSMITTED BY THE CALLING SUBSTATION, A SELECTOR SWITCH FOR EXTENDING THE CONNECTION THEREOVER IN THE DIRECTION OF THE CALLED LINE, A SELECTOR CONTROL CIRCUIT FOR SAID SELECTER SWITCH CONNECTED FOR SEIZURE BY SAID REGISTER MEANS, A NUMBER GROUP CIRCUIT CONNECTED FOR SEIZURE BY SAID REGISTER MEANS IN RESPONSE TO THE REGISTRATION OF DIGITS INDICATING A CALL TO A LOCAL LINE, A BY-PATH LINK CIRCUIT CONNECTED FOR SEIZURE BY SAID NUMBER GROUP CIRCUIT INCLUDING MEANS IN SAID NUMBER GROUP FOR EXTENDING INFORMATION TO THE BY-PATH CIRCUIT INDICATING THE LINE GROUP IN WHICH THE CALLED LINE IS LOCATED, A SWITCHING STAGE INCLUDING A CONNECTOR CIRCUIT FOR A GROUP OF LINES INCLUDING THE CALLED LINE, A CONNECTOR CONTROL CIRCUIT FOR USE WITH SAID CONNECTOR CIRCUIT, MEANS IN SAID BY-PATH CIRCUIT INCLUDING MEANS FOR SEIZING SAID CONNECTOR CONTROL CIRCUIT AND MEANS FOR TRANSMITTING A CALL SIGNAL OVER THE ORIGINATING REGISTER TO SAID SELECTOR CONTROL CIRCUIT RESPONSIVE TO SEIZURE OF AN IDLE CONNECTOR CONTROL CIRCUIT, AND MEANS IN SAID NUMBER GROUP CIRCUIT FOR EXTENDING CERTAIN OF THE INFORMATION RELATIVE TO THE CALLED LINE LOCATION OVER THE BY-PATH LINK CIRCUIT TO THE CONNECTOR CONTROL CIRCUIT FOR USE IN CONTROLLING THE CONNECTOR CIRCUIT TO EXTEND THE CONNECTION TO THE CALLED LINE. 